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New Fourth Edition

Revised and Enlarged

Suplee's Mechanical Engineer's

Reference Book

A Hand-book of Tables, Formulas, and Methods for

Engineers, Students and Draftsmen By Henry Harrison Suplee, B.Sc., M.E. Member American Society of Mechanical Engineers ; Membre de la Société Des Ingenieurs

Civils de France; Mitglied des Vereines Deutscher Ingenieure

Member of The Franklin Institute.

Illustrated. 964 pages. 16mo. Full limp leather, round corners,

gilt edges, thumb index. $5.00 net

M HIS book is intended to form a standard hand-book I for the mechanical engineer and the designer of

machinery, supplying in convenient form the general information which is constantly required. In the new fourth edition the few errors in the previous edition have been corrected and an Appendix of forty pages added, containing a variety of useful information.

Several features make this the one up-to-date complete accurate work for mechanical engineers,-more space has been devoted to Mathematics than in any other similar reference book in English,-the subject of machine design is very amply treated,—the arrangement of the matter is unexcelled, and fully illustrated, which together with the complete thumb index, makes it just the book for quick reference.

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J. B. LIPPINCOTT COMPANY Publishers

Philadelphia

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The Franklin Institute

DEVOTED TO SCIENCE AND THE MECHANIC ARTS
Edited by R. B. OWENS, E.E., M.A., D.Sc., F.R.S.C.

ASSOCIATE EDITORS:
Brig. Gen. James Allen
Harry C. Jones, Ph.D.

Lt. Col. Geo. O. Squier, Ph.D. Wilder D. Bancroft, Ph.D. Harry F. Keller, Ph.D.

C. P. Steinmetz, Ph.D.
John J. Carty, D.Sc.
Gaetano Lanza, C.E.

S. W. Stratton, Sc.D.
A. S. Cushman, Ph.D.
Ralph Modjeski, D.Eng.

Admiral D. W. Taylor
Louis Duncan, Ph.D.
L. A. Osborne, M.E.

S. M. Vauclain, Sc.D.
A. S. Eve, D.Sc.
Albert Sauveur, B.S.

R. S. Woodward, Ph.D.
W. J. Humphreys, Ph.D. Edgar F. Smith, Ph.D.

A. F. Zahm. Ph.D.
COMMITTEE ON PUBLICATIONS:

Louis E. Levy, Chairman
George A. Hoadley

W.C. L. Eglin G eo. D. Rosengarten E. H. Sanborn Vol. CLXXX DECEMBER, 1915

No. 6

Contents
Possible Sources of Potash in America. By Frank K. Cameron . .
The Cracking and Distillation of Petroleum Under Pressure. By Benjamin T.

Brooks . . . . .
The Transformation of Color-mixture Equations from One System to Another.

By Herbert E. Ives . . . . . . . . . . . . . . .
On the Boiling-point of Aqueous Solutions of Nitric Acid at Different Pressures.

Part II. - The Influence of Water-retaining Agents on the Composition
of the Mixture of Maximum Boiling-point. By Henry Jermain Maude
Creighton and Herschel Gaston Smith.

:. : . . . . . . 703 The Production of Light by Animals. By Ulric Dahlgren . . . . . . . 711 Notes from the U. S. Bureau of Standards:

Measurements for the Household . . . . . . . . . . . . . 729 Notes from Nela Research Laboratory:

Visual Pattern-discrimination in the Vertebrates. IV.- Effective Differences in

Direction of Visible Striæ for the Monkey and the Domestic Chick .
Visual Pattern-discrimination in the Vertebrates. A Demonstration of the Dog's

Deficiency in Detail-vision . . . . . . . . . . . . 736 The Franklin Institute:

Stated Meeting, November 17, 1915 . . . . . . . . . . . 739
Committee on Science and the Arts, Stated Meeting, November 3, 1915
Section of Physics and Chemistry, Joint Meetings with Philadelphia Section of American

Chemical Society, October 28 and November 4, 1915; Stated Meeting,

November 11, 1915 . . . . . . . . . . . . . .
A Relation Concerning the Distribution of an Electrolyte between Water and Some

Second Solvent and its Dissociation Constant in Aqueous Solution . . . . 741
Membership Notes. . . . . . . . . . . . . . . . . 742
Library Notes . . .
. . . . . .

. . . .

743 Publications Received . . . . . . Current Topics ........ 652, 701, 702, 709, 710, 728, 733, 734, 748 Index . . . . . . .

759 Announcements . .

. . . . . . . . . . . . xi-xx

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Published by THE FRANKLIN INSTITUTE OF THE STATE OF PENNSYLVANIA,

PHILADELPHIA FIVE DOLLARS PER YEAR (Foreign Postage Additional). SINGLE NUMBERS, FIFTY CENTS.

Entered at the Post-office at Philadelphia, Pa., as second-class matter,

Copyright, 1915, by THE FRANKLIN INSTITUTE.

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The Latest Proof of TYPEWRITER SUPERIORITY

UNDERWOOD

"The Machine You Will Eventually Buy" UNDERWOOD BUILDING

NEW YORK

INDEX TO ADVERTISERS

PROFESSIONAL CARDS, PAGES XXVI AND XXVII
PAGE

PAGE American Pipe and Construction Co. vii | Jennings, W. N., Business Photog

raphy ... ....... xxvi American Pulley Co., The,

Third cover page

Journal of the Association of Engi

neering Societies ....... xxiv Bancroft & Brother, Insurance,

Keystone Screw Co. .........X Philadelphia.......... xxvi

Leeds & Northrup Co., The, ElectriBarnett, G. & H. Co., File Works,

cal Measuring Instruments, Philadelphia .. Fourth cover page

Philadelphia ......... • V11 Bilgram Machine Works, The, Bevel

Link-Belt Co., Conveying MaGears, Philadelphia ...... xxvii

chinery, etc. ........... vi Borden, John, & Co......... xxvi

Lippincott, J. B. Co., Publishers Borgner, Cyrus Co., Fire Bricks,

ii, xxviii etc., Philadelphia ....... XXV Lonergan, J. E. Co., Oilers, etc., Boyden Premium ......... xvii Philadelphia ........... Ix Bradley Printing Co., Philadelphia xxvii Longstreth, The Edward, Silver

Medal ............. xviii Chester Steel Castings Co., Phila

McCaffrey File Co. . Fourth cover page delphia ............. ix

Messner, Charles W., Electrical ConCommercial Photo Engraving Co. . XXV

tractor, Philadelphia ..... xxvii Cresson, Elliott, Medal Award ... XV

Moore & White Co., The, PaperEllis Adding-Typewriter. ...... iii making Machinery ....... iv Emerson, Gilbert D., Library Bind Nice, Eugene E., Mfr. of Paints,

ing, Philadelphia ........ viii Varnishes, Fillers, etc. .... xxvii Fidelity Trust Co. ........ xxvi Oldach Company, Book-Binding . . viii FRANKLIN INSTITUTE, Alumni As Olsen, Tinius, Testing Machine Co.,

sociation ......... iv, xxvii Testing Machines and Hydraulic FRANKLIN INSTITUTE, Announce

Presses ............. 1x ments .............. xi Philadelphia Book Co......... xxvii FRANKLIN INSTITUTE, Awards of, Philadelphia Electric Co. . .... . XXV

xiv-xx

Phosphor Bronze Smelting Co., Phila. vii FRANKLIN INSTITUTE, Certificate

Potts, The Howard N., Gold Medal. xvii i of Membership, Terms and

Powers - Weightman - Rosengarten Privileges ............ xili

Co., Chemists. ......... viii FRANKLIN INSTITUTE, Indices to Subject-matter and Authors . . . xxi

Riehlé Bros. Testing Machine Co. . xxvi

Sadtler, Samuel P. & Son, Consulting FRANKLIN INSTITUTE, Journals

Chemical Experts....... xxvi Wanted ........... xxvi

Scott, The John, Legacy Medal and FRANKLIN INSTITUTE, Reprints for

Premium. .......... .xvi Sale .............. xxiv

Sellers, Wm. & Co., Inc., MachinFRANKLIN INSTITUTE, Library . iv, xxi ists, Philadelphia .........V FRANKLIN INSTITUTE, Officers, Troemner, Henry, Scales ...... ix

Committees, Meetings ...... xii Underwood Typewriter Co. FRANKLIN INSTITUTE, JOURNALS

Second cover page for Sale ............. XX1

United Gas Improvement Co.. . ..xxiii FRANKLIN INSTITUTE, School of Watson & McDaniel Co., Philadel

Mechanic Arts, xxii, Fourth cover phia. . . . . . . . . . . . . . viii page.

Weber, F. & Co., Draughting and Hamlin & Morrison, Analytical

Engineering Instruments ... xxvii Chemists, Philadelphia .... xxvi

Weston Electrical Instrument Co.,

Ammeters and Voltmeters. ...X Howson & Howson, Patent Solicitors, Phila., New York and

| Wiedersheim & Fairbanks, Patents xxvii Washington ... Second cover page Wood, Alan, Iron and Steel Co... vi

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THE LATEST SCIENTIFIC BOOKS

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